[benlumen]

Maybe it's my surname, but it just looks like a population map.

[kibwen]

For common surnames, yes. Mine is quite rare, and while there are naturally a few hits in Berlin, most are concentrated in Southwest Germany, specifically Stuttgart. But you're right that it would be interesting to see the data normalized to population.

[odiroot]

My name is so rare, in my own country, I only get two small spots.

And I don't live (or haven't lived) in any of them.